Ethereum Address Validator MCP Server

A Model Context Protocol (MCP) server providing comprehensive Ethereum address validation, private key validation, checksum conversion, and cryptographic utilities. Its 15 documented tools cover validate, address, key, private.

People connecting this server to Claude, Cursor, VS Code, or another MCP client. The project is written in HTML.

One of 5 MCP servers published from nirholas/ethereum-wallet-toolkit. Stars and repository activity are shared across all of them. See all 5 →

VERIFIED ACTIVE

LAST COMMIT 2026-08-17 · VERIFIED 2026-08-25

NOASSERTION · HTML · how we verify → /methodology

01 · Install Ethereum Address Validator

Claude Code

claude mcp add nirholas-ethereum-wallet-toolkit-validat -- uvx validation-mcp-server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "nirholas-ethereum-wallet-toolkit-validat": {
      "command": "uvx",
      "args": [
        "validation-mcp-server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

pypi package validation-mcp-server - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.nirholas is GitHub-verified and matches the repo owner

03 · What Ethereum Address Validator can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can convert any address to EIP-55 checksummed format, validate arbitrary hex data for Ethereum use, compare two addresses for equality, and validate multiple addresses at once.

Capability map

Tools grouped from the project's README - what Ethereum Address Validator lets an agent do.

Validate

6 tools - e.g. Comprehensive Ethereum address validation with EIP-55 checksum verification; Private key validation with range checking; Validate ECDSA signature components (v, r, s)

validate_address · validate_private_key · validate_signature · validate_hex_data · batch_validate_addresses · validate_ens_name

Derive

2 tools - e.g. Derive Ethereum address from private key; Derive address from public key (compressed/uncompressed)

derive_address_from_private_key · derive_address_from_public_key

Checksum

1 tool - e.g. Convert any address to EIP-55 checksummed format

to_checksum_address

Compare

1 tool - e.g. Compare two addresses for equality

compare_addresses

Generate

1 tool - e.g. Check if address matches vanity criteria

generate_vanity_check

Keccak256

1 tool - e.g. Compute Keccak-256 hash

keccak256_hash

Encode

1 tool - e.g. Encode function signature to 4-byte selector

encode_function_selector

Decode

1 tool - e.g. Decode selector to function signature

decode_function_selector

04 · Who maintains Ethereum Address Validator

Ethereum Address Validator is maintained by nirholas. We track 66 MCP servers from nirholas - 65 actively maintained, 7,658 combined GitHub stars, oldest repo from Feb 2024. Full record: all servers from nirholas.

05 · Facts

repository: github.com/nirholas/ethereum-wallet-toolkit
category: other - actively maintained as of 2026-08-25.
registry: io.github.nirholas/validation-mcp-server (active, first published 2026-01-20)
packages: pypi:validation-mcp-server

06 · Ethereum Address Validator FAQ

Is Ethereum Address Validator still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-17. We re-verify nightly.

What can Ethereum Address Validator do?

How do I install Ethereum Address Validator?

Run `uvx validation-mcp-server`. You can also paste the ready-made client config above.

Does Ethereum Address Validator run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Ethereum Address Validator

Alternatives to Ethereum Address Validator

Maintained other servers if Ethereum Address Validator isn't the fit.

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